Conjunctions, like Prepositions, glue different bits of the sentence together. There are two kinds, coordinating (which add things together) and subordinating (which introduce subordinate clauses).
Coordinating conjunctions, like the ones in red in the passage below,
pose no difficulty to understanding.
The following are usually considered coordinating conjunctions in French:
Subordinating conjunctions are important links which you should be
able to recognize easily (they all end in que except si,
comme and quand) and understand quickly.
The most common subordinating conjunction is que,
meaning that (or than in comparisons). Some
of the others are written in one word, others in two or more. Here are
the most common ones you should know: